Machine for making tracker-nuts.



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'MAGHINE FOR MAKING TRACKER NUTS.

APPLICATION FILED APR. 18, 1902. no nomm. 4 snnrs-snnm a.

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No. 718,117. PATENTED 1 11;. 13, 1903..

11.11. FROTHINGHAM.

MACHINE FOR MAKING TRACKER NUTS. APPLICATION FILED 1m. 1a. 1902.

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DANIEL D. FROTHINGHAM, OF SALEM, MASSACHUSETTS.

MACHINE FOR MAKING TRACKER-NUTS.

SPECIFICATION forming part of Letters Patent No. 718,1 17, dated January 13, 1903.

Application filed April 18, 1902. Serial No. 103,565. (No model.)

To a whom it may concern.-

Be it known that I, DANIEL D. Fnornma HAM, a citizen of the United States, residing at Salem, in the county of Essex and State of Massachusetts, have invented a new and useful Machine for Manufacturing Tracker-Nuts, of which the following is a specification.

My invention relates to machines for piercing and forming leather tracker nuts or buttons used in organs. Said leather buttons are of a hemispherical shape and are provided with a hole extending centrally therethrough. It is very essential that the said hole shall be exactly in the center of said button and of the same diameter throughout.

The object of my invention is to provide a rapid, accurate, and easily-operated machine whereby these tracker-nuts may be cut from pieces of sole-leather and simultaneously pierced withastraight central hole and formed in a hemispherical shape.

My invention consists in a machine as an entirety and in certain novel elements and combinations less than the whole.

Referring to the drawings, Figure 1 is a side elevation of my improved machine for piercing and forming leather tracker nuts or buttons. Fig. 2 is a vertical central longitudinal section, partlyin elevation, of the working parts shown in Fig. 1 viewed in the same direction as in said figure. Fig. 3 is a view similar to Fig. 2, showing the working partsin a different position. Fig. 4is a view similar to Figs. 2 and 3, showing the working parts in their lowermost position. Fig. 5 is a section taken on line 5 5 of Fig. 1. Fig. 6 is a plan view of the Work-support. Fig. 7 is a side elevation of the forming-cutter. Fig. 8 is an underneath plan of said forming-cutter.

Like numerals refer to like parts throughout the several views of the drawings.

In the drawings, 12 is a vertical standard supported upon a base-plate 13 and having'a frame 14, supported upon and fast thereto. A head is fast to a cylindrical reciprocatory slide 16, fitted to slide in a. hole 17, formed in the frame 14 and resting upon a spiral compression-spring 18, contained within said hole 17. The head 15 is raised and lowered by means of a hand-lever 19, pivoted at to the frame 14 and to the head 15 by a link 9, and the spindle 21 is rotated in bear- .of the rotary forming-cutter 35.

ings 22 upon the frame 14 by a cone-pulley 23, said cone-pulley being rotated by a belt 24, which passes over idler-pulleys 25 upon the frame 14 and is driven by a cone-pulley 26, fast to a counter-shaft 27, driven by a pulley 28.

The spindle 21 projects upwardly from the frame 14 and rotates in a bearing 29, formed upon the head 15. Said spindle is shouldered at and has a collar 31, fast to the upper end thereof by a nut 32. The cone-pulley 23 issplined to the spindle 21, so that as the head 15 is raised and lowered by the handle of the hand -lever 19, carrying the spindle 21 with it by means of the collar 31 and shoulder 30, respectively, said spindle slides vertically in the bearings 22 22 through the cone-pulley 23. The lower end of the spindle 21 is provided with a vertical cylindrical recess 33 to receive the shank 34 Said forming-cutter is adj ustably fastened to the spindle 21 by means of a set-screw 36'and is provided with a curvedcutter-blade 37, adapted to cut andform an object of hemispherical contour. The forming-cutter has a vertical cylindrical hole 38, (see Fig. 7,) passing centrally through the shank thereof to receive and guide a twist-drill 39, and is also provided with slots or openings 40, through which the chips from the drillpass outwardly therefrom. i The drill 39 is fastened by shouldered screws 42 42 to a cylindrical sliding holder 41, fitted to slide in the cylindrical recess 33. The heads of the screws 42 pass through vertical slots 11 11, formed in the spindle 21, and engage a sleeve 43, arranged to slide lengthwise of the spindle 21.

The sleeve 43 is provided with an annular groove 44, containing two semi-annular rings 45, connected by screws 46 to a forked lever 47, pivoted at 48 to a forked carrier 49, adjustably'fastened by screw-threaded engagement to the lower end of a rod 50, said rod being rigidly fastened by screw-threaded engagement to the head 15. The right-hand end of the forked lever 47, Fig. 2, enters a slot 51 in the guide-frame 52 and is held against a vertical block 10, located in said slot 51, except as hereinafter described, by a spiral tension spring 53,fast at its upper end to the frame 14 and connected at its lower end by a link 54 to the forked lever 47.

( s Gi The lever 47 is also guided against lateral movement by passing through a slot 55, formed in the guide-frame 52, said guide-frame 52 being rigidly fastened to the standard 12 and to the frame 14 by screws.

A work-table 56 is clamped to the vertical standard 12 by a clamp-screw 57 and is provided in the front end thereof with a cylindrical hole 58 to receive the work-support 59, said work-support being clamped to the worktable 56 by a clamp-screw 60. The upper face of the work-support 59 is provided with pins 61 to engage and hold in position the leather 62 while the same is being drilled and cut, as hereinafter described. Said work -support also has provided in its upper face and centrally thereof a cylindrical recess 63 to receive and guide the point of the drill after the same has passed through the leather 62. Said work-support also has provided in its upper surface an annular groove 64, centrally located about the recess 63 and acting as a guide for the lower end of the curved cutter blade 37.

A gage 65 is adjustably fastened by a screw 66 to a gage-holder 67, adjustably fastened by a screw 68 to the guide-frame 52.

The general operation of the machine hereinbefore described is as follows: The leather 62 from which the hemispherical objects are to be cut is placed upon the work-support 59 and pressed downwardly upon the pins 61, so that it may be held firmly upon said work- 'support against the action of the cutter 37 and drill 39. Assuming the parts to be in the position shown in Figs. 1 and 2, the operator depresses the handle 19 and also the head 15 against the action of the spring 18. The spindle 21 is carried downwardly by the head 15, sliding through the bearings 22 and the cone-pulley 23 and carrying the forming-cutter 35 therewith. Simultaneously with the downward movement of the spindle 21 the rod 50, rigidly connected to the head 15, is lowered an equal distance therewith, and being connected at its lower end to the forked lever 47 it pushes said forked lever downwardly at the central portion of said lever, Where it is connected thereto, the righthand end of said lever 47 being held upwardly by the spring 54 against the block 10 and the left-hand end of said lever being moved downwardly by the rod 50 and carrying with it the sleeve 43, together with the sliding holder 41 and drill 39, from the position shown in Fig. 2 to that shown in Fig. 3.

It will be seen that during the hereinbeforedescribed portion of the descent of the head 15 the sleeve 43 will be moved substantially twice the distance downwardly that the spindle 21 moves in the same time, by reason of the lever 47 multiplying in the ratio of about two to one the distance moved by the head 15 and the spindle 21 and rod 50. To regulate and limit the distance to which the head 15 and spindle 21, together with the parts at tached thereto, may be lowered, a stop-pin 7 O is provided, adjustably fastened by a setscrew 71 to the head 15, and when the parts are brought to their lowermost position, as shown in Fig. 4, the lower end of said stoppin abuts against the upper surface of the boss 72, formed upon the frame 14. The lever 47 during the first portion of its descent is fulcru med at its right-hand end against the block 10 and held thereagainst by the spring 53. (See Figs. 2, 3.)

When the sleeve 43 has been brought to the position shown in Fig. 3, the drill 39 will be in advance of the rotary cutter 37 and the screws 42 will have arrived at the bottom of the slots 11 11. vUpon a further descent of the head 15, spindle 21, and rod 50 the lever 47 will be carried bodily downward, expanding the spring 53, and the drill will be forced through the leather 62, (see Fig. 4,) beingfollowed by the rotary forming-cutter 35, thus drilling a hole through the leather 62 and following it with a cutting action by the forming-cutter 37, which severs the buttons 69 from the stock 62 and simultaneously imparts a hemispherical contour thereto.

Having now drilled, cut, and formed the button 69, the operator raises the hand-lever 19 and the parts are returned from the position shown in Fig. 4 to the relative positions shown in Figs. 1 and 2, the drill retreating into the cylindrical hole 38 and stripping the leather button thereby, whereupon said button falls into a chute or receptacle provided for the purpose.

The spring 18 assists in raising the head 15 and holds it in raised position until the operator lowers the head by means of the handlever 19, as hereinbefore described.

Having described my invention, what I claim is 1. A trackernut-forming machine composed of a supported frame, a head, a reciprocated slide fast thereto and sliding in said frame, a compression -spring whereon said slide rests, a link pivoted to said head, a handlever pivoted to said frame and to said link, a properly-recessed spindle rotating in bearings upon said frame and also in shouldered bearings upon said head so as to rise and fall therewith, a rotary forming cutter whose shank is perforated and adjustably received in said recessed spindle and provided with a curved cutter-blade and with chip-passages, a twist-drill passing axiallyinto said perforated shank, a cylindrical sliding holder, fitted to slide in arecess of said spindle, aguideframe, a forked lever adjustably fastened at one end by a sleeve to said spindle and its other end entering a slot in said guide-frame, a rod adjustably fixed to said lever and fastened in said head, a spiral spring fastened to said head and to a link connected to said forked lever, a table adapted to hold the material for the nut and permit gyration of the cutter-blade, and pulleys adapted to rotate said spindle, and connected drill and cutter; substantially as described and shown.

2. In a tracker-nut-forming machine, the combination of a recessed spindle 21 having the recess 33 and vertical slots 11, a sleeve 43 having an annular groove 44 and sliding on said spindle, two semicircular rings 45, a cyiindrical sliding holder 41 within the recess 33, a rotary forming-cutter 35, having a shank 4 with an axial hole 38 adj ustably fastened to spindle 21, and having also a cutter-blade 37 and openings 40 for passage of chips, a twist-drill 39 fastened to said holder 41; substantially as described.

3. In a tracker-nut-forming machine, the combination of a recessed spindle 21 having the recess 33 and vertical slots 11, a sleeve 43 having an annular groove 44 and sliding on said spindle, two semicircular rings 45, a cylindrical sliding holder 41 within the recess 33, a rotary forming-cutter 35, having a shank 34 with an axial hole 38 adjustably fastened to spindle 21, and having also a cutter-blade 37 and openings 40 for passage of chips, a twist-drill 39 fastened to said holder 41, with a movable head supporting said spindle, a frame adapted to support said head and spindle, a forked lever adjustable, connected to said sleeve 43, a guide-frame for said lever connected to said head, means for moving said head and guide-frame, lever, and head,

means for rotating said spindle and connections, and a table adapted to hold and present the material to be formed to said twist-drill and cutter-head; substantially as described.

4. In a tracker-nut-forniing machine, the combination of a vertically-traveling and rotating drill 39, with a vertically-traveling and rotating forming-cutter 35 composed of an axially-perforated shank 34 having a chipsaid lever 47 are loosely pivoted, and means for controlling the distance of vertical movement of said collar; substantially as described and shown.

In witness whereof I hereunto set my hand this 16th day of April, A. D. 1902.

DANIEL D. FROTHINGHAM.

In presence of- I NORMAN CALL, FRED G. OHAMBERLIN. 

